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Is there a Power-up sequence for VBUS_DS and VBUS_US in HX3?
Can it supply 5V regardless of the rise of 1.2V or 3.3V?
Thanks,
Tetsuo
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USB Hosts Hubs Transceivers
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Hi Tetsuo-san,
There is no Power sequencing requirement for VBUS_US.
After Power-up, HX3 will provide the termination resistor(on the data lines) for enumeration only when VBUS_US is high.
Thanks,
Ajeeth
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Hi Tetsuo-san,
Thanks for posting in the Infineon Developer community.
VBUS_US and VBUS_DS are the PWR pins.
VBUS_US pin is used for detecting VBUS from the US port and when VBUS Detection is not needed(For Ex. Embedded Hub), this pin should be tied to VCC_5V with 10K Resistor divider.
VBUS_DS pin is used to power the Apple-charging circuit in HX3.
For more details, please refer to the HX3 datasheet.
Thanks,
Ajeeth
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Ajeeth-san,
If it connects VBUS_US to a local 5V, is there a power-up sequence?
Thanks,
Tetsuo
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Hi Tetsuo-san,
There is no Power sequencing requirement for VBUS_US.
After Power-up, HX3 will provide the termination resistor(on the data lines) for enumeration only when VBUS_US is high.
Thanks,
Ajeeth
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Ajeeth-san,
Thank you for your support.
I could understand.
Thanks,
Tetsuo